System Requirements:
Over Android 2.3 version
A USB OTG interface in mobile or Tablet .
USB OTG Cable.
The USB Serial Port adapter.

For the sake of various standards of Android mobile phone and Tablet, please check your mobile as below to make sure that app can work well:
1. Please check if mobile support the function of USB OTG.
2. Though some mobiles have OTG function, they still need the permission of ROOT while using UART.
3. Though some mobiles have OTG function, they don't supply power in the USB port. Hence, you must prepare power or USB HUB.
4. The mount point of UART adaptors in some mobiles are not absolutely the name of “/dev/usb”, you can use file manager to check the mount point and inform us the name of it also.
5. Anyway, you should see the UART adapter in your mobile device, and it may be in the "/dev/usb"

PS:
1. The advertisement will be removed from paying version.
2. If there's any problem, please feel free to contact us soon.